Phone charging slowly all of a sudden? Check these first

Slow charging that comes on suddenly, rather than gradually over months, almost always points to something physical rather than a software setting. Here's the order I'd check.

Look inside the charging port with a flashlight

This sounds almost too basic, but it's the actual cause more often than people expect pocket lint compacts into the port over time and partially blocks the connection. Shine a phone flashlight (use a second device) into the port. If you see grey fuzz packed in there, that's very likely your answer.

A wooden toothpick, used gently, gets it out without risking damage the way metal tools can. Don't use anything sharp or metallic it's easy to bend a pin inside and turn a 10-minute fix into an expensive repair.

Try a different cable before blaming the phone

Cables wear out, especially at the bend near the connector, long before most people replace them. If you've got a second cable lying around even a borrowed one test with that before assuming anything's wrong with your phone itself.

Check the wall adapter's wattage

Not every charger is built the same, even ones that physically fit. A 5W adapter charging a phone that supports 20W fast charging will take noticeably longer, and it's an easy mismatch to end up with if you've swapped chargers around the house. Check the small print on the adapter itself most list their wattage right on the brick.

Background apps can slow charging too

If the phone's actively running something demanding recording video, downloading a big update, a game left open in the background it can offset a meaningful chunk of incoming charge. Worth closing background apps if you need a fast top-up before heading out.

If none of that explains it: battery health

On iPhone, Settings → Battery → Battery Health will flag if the battery itself has degraded enough to affect charging behavior. Android doesn't have a built-in equivalent on every phone, but manufacturer apps (like Samsung Members) often include one. This is the one cause on this list that needs an actual repair, not a quick fix.

What it turned out to be for me

Port lint, exactly as described above. Genuinely a two-minute fix once I knew to look. Worth checking before anything else on this list, since it's the fastest thing to rule in or out.